CN101223803A - Call gapping to reduce network congestion in wireless communication system - Google Patents
Call gapping to reduce network congestion in wireless communication system Download PDFInfo
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Abstract
A wireless cornunication system (500) provides a number of communication resources for a plurality of mobile stations (512-516). The wireless communication system employs a call gapping process and comprises a number of communication paths for routing a communication initiated by one of the plurality of mobile stations (512-516) to a destination node. One or more of the plurality of mobile stations (512-516) is configured to perform the call gapping process. A communication unit and a method of congestion relief are also provided. The proposed technique provides congestion relief using call gapping, extended to use by a wireless subscriber unit to minimise air-interface traffic in a wireless communication environment. In this manner, calls are prevented from being initiated when they would have ultimately resulted in an unconnected call.
Description
Technical field
The present invention relates to be used for reduce the mechanism of the network congestion of communication system.The present invention can be used for its operation of (but being not limited to) wireless subscriber unit self-regulation to reduce the mechanism of the network congestion in the cellular communication system.
Background technology
Wireless communication system, for example cell phone or private mobile radio communications system provide the wireless telecommunication link that is arranged between a plurality of base transceiver stations (BTS) and a plurality of subscriber unit usually, and subscriber unit often is called travelling carriage (MS).
In wireless communication system, each BTS has a specific geographical coverage area relevant with it.Transmitter power level has defined BTS with the receiver sensitivity performance can keep acceptable overlay area of communicating by letter with MS.Usually, the overlay area is configured to overlapping areas, between the zone, is easy to carry out continuous communication when mobile with convenient MS.Usually these overlay areas are called the sub-district, they can join together to form the wide overlay area of communication system, and country-wide covering for example is provided.
Wireless communication system is compared with for example public switched telephone network fixed communicationss such as (PSTN), its difference mainly is, travelling carriage moves between by the overlay area of different B TS (and/or different service provider) service, and can suffer from the wireless propagation environment of variation in moving.Therefore, in wireless communication system, MS in different geographic areas/carry out handover operation during moving between cells.By this way, MS can be supported that by nearest BTS this provides the signal/communication link of first water usually in its communication.Each BTS is connected to base station controller (BSC), and they constitute base station switching point (BSS) together.
The coordination cellular radio Communication system of having set up is global system for mobile communications (GSM), and voice and short data message communicating mainly are provided.Develop the enhancing of this cellular technology and used, be called General Packet Radio System (GPRS).GPRS is provided at the packet-switch technology on the GSM commutation circuit cellular platform.
Fixed network interconnects all BTS by each BSC.This fixed network comprises communication line, switch, to the interface of other communication networks with move the required various controllers of this network.To be routed to the destination node or the communication unit of this call identification from the calling of MS by fixed network.If calling out is between two MS of same communication system, then route the call to the BTS of current another MS sub-district of living in by fixed network.Connect between two Serving cells by fixed network thus.As an alternative, be at MS and be connected between the phone of public switched telephone network (PSTN), then will call out from serving BTS and be routed to interface between cell mobile communication systems and the PSTN if call out.Then by PSTN with it from this interface route to phone.
In field of wireless communications, known particular event meeting places telecommunication system under the offered load of increase, causes communication link fails.For example, knownly can cause a large amount of call attempts of particular number or particular group number such as " incidents " such as mistake, accident, advertising campaign, video telephone hot lines, this has increased offered load.
In the wireless communication system 100 of Fig. 1, this situation has been shown.A large amount of wireless subscriber units 110 attempt connecting particular telephone number, for example telephone number " X " 160.Therefore, use the wireless transmission 115 of air interface resource in a large number with each BSS 120 of carrying out subscriber unit.It is very heavy that fixed network between wireless BTS and wireless exchange board 130 connects 125 loads that also become.All these callings all are routed to target switch 150 by core network 140 then.Usually, object element " X " 160 uses the telephone wire of limited quantity to come to receive these callings from target switch 150.Therefore, the calling of a large amount of incoming calls takies valuable resource, but is finally refused by target switch 150.
Known under extreme case, target phone switch 150 may break down under the load of the call attempt of refusing a large amount of incoming calls.This is a serious problem, and Virtual network operator is kept the staff and come this incident is taken preventive measures.
A kind of known technology that is commonly used to solve this problem in the fixed network is called " calling interval ".Second kind of known technology is " coding blocks "." coding blocks " technology is blocked the calling that a part is routed to specific objective coding/address.In most of the cases, can also block the address that control comprises calling station by prescribed coding.
On the other hand, similar with the control of coding obstruction, calling interval control is restricted to the route of specific coding or station address.Calling interval comprises adjustable whole timer, it from such as stop the calling of prescribed coding in time interval of selecting 16 different time intervals.After the time interval expires, allow a paging call network of prescribed coding or address, afterwards, the calling interval process is restarted another time interval.Known in a large amount of situations of calling out of control, calling interval blocks control than encoding more effective.
Signal Figure 200 among Fig. 2 illustrates the principle of calling interval.Calling interval relates to the call attempt of automatic refusal part incoming call.This refusal is handled inlet telephone exchange 230 places that are arranged at core network 140, and is congested to avoid route.Because these callings of failing automatically can not visited the overload impact point 150 in the core network 140, therefore reduced signaling load at this point and whole network 140.
Typically, when specific objective point 150 experience or expection will be experienced excessive call attempt, then start calling interval at 130 pairs of these numbers of all telephone exchanges.Setting has been shown in the flow process 300 of Fig. 3, has revised the processing of calling interval mode of operation.
The operation of wireless communication system and administrative center (OMC) are to how and call calling interval under what conditions and make definite.From idle condition, OMC (or operator) learns that there is overload/congested network scenario in (or recognizing) in particular network node " A " in step 310.In response to this, OMC calls calling interval and handles, as shown in step 320.OMC sends message to all communication exchange functional devices (router, gateway etc.), to begin calling interval at their specific nodes then.Calling interval is applied to receive and be addressed to " X% " in the calling of particular number or number sets at the communication exchange functional device, shown in step 330.In step 360, the OMC returning to idle mode finishes up to " incident " then.
Therefore, calling interval causes a large amount of telephone exchanges that starts automatically to make " X " individual inefficacy in " Y " individual calling that destination number is carried out.Therefore, actual have only that (Y-X) in " Y " individual calling is individual to be stayed ingress switch and make it arrive target switch.
In a similar manner, in step 340, when recognizing or learn that overload/when congested situation no longer existed, OMC (or operator) revised calling interval and handles.When this happens, in step 350, OMC sends message to all switches, revises them the calling interval of destination node " A " is handled, and return idle mode of operation in step 360.
Operation at the switch place has been shown in the flow process 400 of Fig. 4.About this, a kind of with in following three kinds of modes, the idle mode of operation from step 405 is waken switch up.In step 410, switch receives message from OMC, calls the calling interval to destination node, particular telephone number or number sets, and blocks the calling of " X% ".In step 415, switch upgrades its calling interval tabulation to destination node/(number) according to the standard of blocking " X% " calling then.In step 455, switch returns idle mode of operation then, carries out calling interval simultaneously.
Shown in step 430, when the call attempt of the destination node that receives partial blockage " A ", after switch called the calling interval operator scheme, switch can wake up from the idle mode of operation of step 405.Shown in step 435, if the call targets that switch is determined expection with normal mode not in the calling interval tabulation, in step 445, switch is set up and is called out, and returns the clear operation state in step 455.Yet if determine the expection call targets in the calling interval tabulation at step 435 switch, switch calls calling interval with (for example).About this, calling interval allows a connection request of controlled encoding or code set to be received in the network by each node.Whenever " X " second once this connection of permission.In ensuing " Y " second, any connection request that arrives after the connection request of accepting all is rejected.By this way, calling interval has limited the quantity of successful connection request effectively, and has stoped the network over loading to specific focal point, shown in step 440.
If the value of the random number that switch determine to produce is higher than the obstruction percent value of request, then switch is established to the calling of target " A " in step 445, and returns idle mode of operation in step 455.Yet, if determining the value of the random number of generation, switch is equal to or less than the obstruction percent value of request, switch is not established to the calling of target " A " in step 445.Switch returns " network busy " message to the originating call person then, and in step 455 oneself is turned back to idle mode of operation.
Therefore, for fixed network, calling interval is effective.Yet when using in adopting the mobile network who shares air interface, for example in the GSM cellular communications networks, the calling interval technology is not too effective.
Numbering 5548533, the United States Patent (USP) that is entitled as " Overload control for a central processor in theswitching network of a mobile communication system " have been described a kind of network over loading controlling mechanism of central processing unit of the switching network that is used for mobile radio system.Central processing unit can be the part of mobile switching centre (MSC).In United States Patent (USP) 5548533, be broadcast to peripheral processor based on the congested report of handling the delay of experience by Messages-Waiting at central processing unit.Peripheral processor is arranged in the interface of this MSC of MSC and other network element, and other network element is base transceiver station (BTS), PSTN or other MSC for example.Therefore, configuration MSC is with a large amount of call attempts of refusal from the wireless subscriber unit reception.
Yet, to have only minimum or do not have chance of success from a large amount of call attempts of mobile subscriber are actual, they still consume important and rare radio resource.Particularly, uncommon incident, for example traffic accident can cause carrying out too much mobile calls in the specific region, and this has caused communication issue to all mobile subscribers in this zone.
Therefore, needing in the field of the invention provides a kind of communication system and method, is used for the congestion relief in the network over loading situation, has wherein eliminated foregoing shortcoming.
Summary of the invention
According to a first aspect of the invention, provide a kind of wireless communication system as claimed in claim 1.
According to a second aspect of the invention, provide a kind of communication unit as claimed in claim 8.
According to a third aspect of the present invention, provide a kind of congestion relief method as claimed in claim 13.
According to a fourth aspect of the present invention, provide a kind of storage medium as claimed in claim 18.
Generally speaking, inventive concept of the present invention is by moving on to calling interval mechanism in the wireless subscriber unit, minimize so that the waste of air interface and the communication link from the communication for service unit to ingress switch is used, thereby alleviated the problem relevant with prior art.
Therefore, the calling interval function is moved on to prevent from the wireless subscriber unit to start can't be by the calling of destination node or switch processes.This has prevented from any part of network the congested of waste to be taken place.Preferably, the calling interval parameter is broadcast to cell site, so that so as to sending to all subscriber units.
Description of drawings
Fig. 1 illustrates the schematic diagram of cellular radio Communication system, and it shows destination node/number that a large amount of callings are routed to overload;
Fig. 2 illustrates the schematic diagram of cellular radio Communication system, and it shows a large amount of destination node/numbers that are routed to overload of calling out when adopting calling interval;
Fig. 3 illustrates the flow chart of the calling interval mechanism of OMC;
Fig. 4 is illustrated in the flow chart of the calling interval mechanism of implementing at the ingress switch place.
Below with reference to accompanying drawing example embodiment of the present invention is described, wherein:
Fig. 5 illustrates the block diagram of the cellular radio Communication system of each inventive concept that is suitable for supporting the preferred embodiment of the present invention;
Fig. 6 illustrates the schematic diagram of a communication system, the calling interval that its explanation is adopted in the preferred embodiment of the present invention;
Fig. 7 illustrates the flow chart of calling interval mechanism of the OMC of each inventive concept that is suitable for supporting the preferred embodiment of the present invention;
Fig. 8 illustrates the flow chart of calling interval mechanism of the BSS of each inventive concept that is suitable for supporting the preferred embodiment of the present invention;
Fig. 9 illustrates the flow chart of calling interval mechanism of the MS of each inventive concept that is suitable for supporting the preferred embodiment of the present invention;
Figure 10 illustrates the wireless communication unit that is suitable for according to the preferred embodiment of the present invention.
Embodiment
At first with reference to figure 5, summary shows cellular telephone communication system 500 according to the preferred embodiment of the invention, supports for example global system for mobile communications (GSM) air interface.ETSI (ETSI) will be used for the air-interface standardization of global system for mobile communications (GSM).
Usually, from the base transceiver station that is arranged in network architecture air interface protocol is managed, they are spaced apart geographically, and a sub-district (perhaps, for example the part of sub-district) is supported in base station.A plurality of subscriber units (hereinafter referred to as travelling carriage) (MS) 512-516 are communicated by letter with a plurality of base transceiver stations (BTS) 522-532 by the air interface 518-520 that selects.For clarity sake, only show the MS 512-516 and the BTS 522-532 of limited quantity.BTS 522-532 can be connected to traditional public switched telephone network (PSTN) 534 by base station controller (BSC) 536-540 and the 542-544 of mobile switching centre (MSC).
Each BTS 522-532 mainly is designed for the main plot of serving it, and each BTS522-532 comprises one or more transceiver units, and the 556-566 that communicates by letter with other parts of cellular system infrastructure.
Each base station controller (BSC) 536-540 can control one or more BTS 522-532, and BSC 536-540 is usually by MSC 542-544 interconnection.The BTS-BSC combination is commonly referred to base station switching point (BSS).Each MSC 542-544 is provided to the gateway of PSTN 534, and MSC 542-544 is by operation and administrative center (OMC) 546 interconnection, and OMC546 manages the general control of cellular telephone communication system 500, as skilled in the art to understand.
Each system element, for example BSC 536-538 and OMC 546 comprise control logic 548,550,552, each system element has relevant memory function element 554 (for clarity sake, only BSC 538 being illustrated) usually.The memory function element of OMC 546 is stored (in-call) data in historical operating data that compiles and the calling, calling interval obstruction percentage and relevant destination node/number usually, or the like.
Fig. 5 shows the gsm system that is coated with General Packet Radio System (GPRS) air interface, in order to the grouped data ability to be provided.Can handle the subscriber unit (for example MS 512) of grouped data like this, in a large number can communicate by letter with the packet data call on the GPRS network through the circuit switching on the GSM network (CS) calling.GPRS network comprises a large amount of packet control units (PCU) 570,580, and they operationally are coupled to Serving GPRS Support Node (SGSN) 572,582, to promote the communication of from MS to the packet data network (for example the Internet 534).SGSN 572,582 (for clarity sake, only showing two) operationally is coupled to GSM BSC536-538.SGSN operationally is coupled to the external packet data network through GGSN GGSN 574,584.
According to a preferred embodiment of the invention, the calling interval of being implemented by OMC and MSC is usually handled and is extended to air interface communication unit, i.e. BTS and MS.Particularly, adopt the air interface communication unit to call calling interval, rather than ingress switch, attempt waste of radio resources is used thereby on the source, stoped by blocked call.Fig. 6 shows calling out the schematic diagram that route is revised.There is shown the adaptation change of OMC, BTS and MS operation to the flow process of Fig. 9 at Fig. 7.
Usually, know that the change of the calling interval operation in OMC 546, BTS 522 and MS 512 (as according to preferred embodiment of the present invention programming) can realize with any suitable mode in the corresponding communication unit.For example, new device can be added to conventional BTS522 or MS 512, or as an alternative, the existing part of conventional BTS 522 or MS 512 can change, for example pass through one or more processor reprogramming.Like this, desired change can realize with the form that is stored in the processor executable on the storage medium, any combination of described medium such as floppy disk, hard disk, programmable read-only memory (prom), random asccess memory (RAM) or these or other storage medium.
With reference to figure 6, show the schematic diagram of cellular radio Communication system 600, wherein, the figure shows the calling interval that in the preferred embodiment of the present invention, adopts.In experience or expection will experience excessive call attempt the time, sign specific objective node/telephone number 150.Thus, by such as the OMC that operationally is coupled to core network 140 calls the calling interval to this specific objective node/telephone number 150.
According to a preferred embodiment of the invention, OMC indicates BSS (BSC and BTS) and is begun to handle based on the calling interval of MS by each MS that this BSS serves.Like this, the wireless subscriber unit 610 of limited quantity attempts to get in touch specific objective node/telephone number " X " 160.Configuration MS handles to carry out the self-regulation calling interval; So that restriction is based on the generation and the transmission of the communication of air interface.The calling of guaranteeing only to carry out given percentage is handled in self-regulation, some MS 610 successes in self-regulation is handled, and other are then unsuccessful as MS 612.The preferable mechanism that is used for determining which MS success is described after a while.
Therefore, the less significantly wireless transmission 615 that is used to carry out this each BSS 620 to subscriber unit of air interface resource.Advantageously, the fixed network between wireless BTS and wireless exchange board 130 connects 625 and also lessly significantly is used to carry out this transmission.The calling that produces is emission and be routed to target switch 150 by core network 140 on the interface aloft then.Yet, note having only quite few calling to arrive ingress switch 130.
Less incoming call is refused by target switch 150.Like this, a large amount of communication path/routes are used by optimum, and it is congested to avoid becoming, and have only the quite few call try that carries out on these communication path/routes failure.
In a preferred embodiment of the invention, on the broadcast channel of influence sub-district, send message to MS.Preferably, this message comprises one or more in the following item of information, so that MS can carry out the self-regulation calling interval:
(i) to use the telephone number of switch of the overload of calling interval mechanism to it;
(ii) to use the group with telephone numbers or the scope of switch of the overload of calling interval mechanism to it;
(iii) allow the percentage of the calling carried out from MS; And/or
(iv) duration of calling interval mechanism maintenance activity.
In enhancement mode embodiment of the present invention, in broadcast, can comprise more than one number range.For example, know that the first general restriction can be applied to employed all numbers, they are relevant with overloaded network.The application of this first scope provides and for example uses 10% call attempt rate.Know that can also use second scope, for example second scope is defined as emergency numbers.Therefore, second scope can allow these callings 100% to pass through.Those of skill in the art will recognize that many alternate application can use two or more obstruction percent value.
In addition, be that the foregoing invention design can be applied to the calling interval that uses any one or a plurality of destination addresses within the present invention expection.Therefore, this inventive concept can be applied to the number (for example, the part of the address in the particular switch node) of one number, a column number, a scope, the number of several scopes, or the like.
Get back to Fig. 7, in response to the message from OMC, order MS begins the calling interval to " X% " of the calling that is addressed to particular number or number sets, shown in step 730.In step 760, the OMC returning to idle mode finishes up to " incident " then.
Therefore, the calling interval of the preferred embodiment of the present invention is handled to make and is started from being to reduce " X " automatically " Y " each air interface of target is called out with this destination number.Therefore, actual have only that (Y-X) in " Y " individual calling is individual to send to its serving BTS/BSS from wireless MS, and finally arrive target switch through the switch that starts.
In a similar manner, when recognizing or learn that network over loading/when congested situation no longer existed, OMC (or operator) revised calling interval and handles, shown in step 740.When this happens, in step 750, OMC sends message to all switches, revises MS self-regulation calling interval and handles, and return idle mode of operation in step 760.
Know that term " modification " call congestion is handled expression and revised (for example changing address list) or the tabulation of termination (for example emptying address list) call congestion.
In a preferred embodiment of the invention, suitably carry out calling interval and handle, thus, some in the wireless calling (as being discovered by MS user) will then be carried out.Similarly, some are attempted wireless calling and will receive the " network busy " notice.Yet advantageously, inventive concept described herein is guaranteed to implement calling interval and is handled before any call attempt sends to communication network.Therefore, (that is, in origination terminal) carries out Selective Incoming Call on the source.
Note, call calling interval according to the information that provides by network and handle.With reference to figure 8, show the flow chart 800 of the preferred calling interval mechanism of BSS according to the preferred embodiment of the invention.
The base station switching point (BSS) of wireless communication system, such as BTS 532 and BSC 536 (forming the base station switching point in Fig. 5) receive instruction from OMC, call calling interval and handle.In step 805, from idle condition, BSS learn such as overload/congested network situation that particular telephone number or network node " A " are located.BSS learns needs the beginning calling interval to handle, and is clogged to the calling of " X% " of this telephone number or network node " A ", shown in step 810.In response to this, BSS upgrades its calling interval tabulation, shown in step 815.In step 820, BSS preferably arrives all MS that supported by this BSS with information broadcast then.In step 840, BSS returns the clear operation state then.With the calling interval information broadcast is different to the MS of all supports, know, in some cases, this message can be sent to specific MS group or each MS, if they are identified as one or more MS that adopt the self-regulation calling interval to handle.
Advantageously, the preferred embodiments of the present invention can be used the message transmission capacity, Short Message Service (SMS) message for example, the MS that calling interval is required to broadcast/be delivered to all or selects quantity.In following situation, this method can be used for target specific user or user's group:
(i) specific user is identified as main users, and can carry out calling interval more continually to it;
(ii) exist operator to wish " denial of service " attack (may not be malice) that reduces.This may be that the system that redials automatically by mistake causes.
(iii) some users have received the grade of service different with other users (GoS), and bear calling interval service in various degree thus.
In a similar manner, in step 825, when receiving instruction from OMC, BSS revises calling interval and handles.When this happens, in step 830, BSS upgrades its calling interval tabulation once more by removing the project of particular telephone number or destination node " A ".In step 835, BSS will revise the MS of call congestion information broadcast to all supports then, and return idle mode of operation in step 840.
From the viewpoint of MS, in a preferred embodiment of the invention, so the decision that continues still to refuse call attempt is carried out in inside.Those of skill in the art will recognize that for MS, exist a lot of mechanism to come to make decision whether carrying out request call.A kind of preferable mechanism is that MS produces the random test number, and the probable value that will count and receive from network compares.In the flow chart 900 of Fig. 9, this processing has been described.
MS begins in idle mode of operation, shown in step 905.In step 910, MS receives broadcast from its serving BS broadcasts S, to such as node " A " beginning calling interval handle.Preferably, this broadcast comprises the percentage of the calling that will block.In addition, broadcast also preferably includes timeout value " T ".In response to receiving this broadcast, MS upgrades its calling interval tabulation to target " A " in step 915, and in the step 920 device operation that picks up counting.
In step 970, MS handles about calling interval and returns idle mode of operation (except that function timer) then.In step 940,, expect that then " incident " finishes if timer " T1 " at the expiration.In step 925, when receiving broadcasting " modification calling interval message " from its serving BS broadcasts S, MS thinks that also " incident " finishes.In response in the both of these case any, in step 930, MS upgrades its calling interval tabulation by removing the project to target " A ".In step 935, timer stops then, and afterwards in step 970, MS returns the clear operation state.
Handle specific objective when effective at calling interval, in step 945, if the user attempts proceeding to the calling of target " A ", then MS determines that the number called out is whether in the calling interval tabulation, shown in step 950.In step 950, if the number of calling out not in the calling interval tabulation, then in step 960, MS sets up calling.Yet if in step 950, the number that MS determine to call out in step 955, is determined the number that whether should block this calling in the calling interval tabulation.About this, MS preferably uses randomizer to produce such as a value between " 0 " and " 1 ".The obstruction percentage that will be worth then and be informed by BSS compares.If this value has surpassed obstruction percentage, then in step 960, MS normally sets up calling.Yet if this test crash, in step 965, MS returns the " network busy " indication to the user, returns idle mode of operation in step 970 afterwards.This mode has been utilized the intelligent of cellular terminal, manages the use of rare Radio Resource intelligently.
Although described the preferred embodiments of the present invention, should be understood that can use any amount mechanism to carry out call attempt passes through/the failure decision according to using randomizer scheme realization calling interval to handle.For example, possible mechanism comprises:
(i) use randomizer, as mentioned above;
(ii) MS calculates and passes through/the Time To Failure window; And
(iii) network indication effectively and/or ineffective time window as the signal in the calling interval broadcast (for example usage flag).In this case, by/failure probability be common for all travelling carriages in the sub-district.
When MS received broadcast, the MS storage also activated these restrictions, preferably for the time period of indicating in this message.If this message receives once more, then with the timer reset-to-zero of time in the past and restart.Therefore, should be understood that the necessary periodic broadcasting of network these restrictions in the time period at the expiration, otherwise these restrictions will be removed from MS automatically.
Within the present invention's expection is that multiple situation can be called foregoing calling interval and handle.For example, under cell-overload or congested situation, perhaps after the specific geographical area had an accident, calling interval can be applied to any amount of cell site in this zone.By this way, the calling interval of selecting is geographically handled the ability that MS can be carried out normal call and is reduced such as first percentage, will to such as a large amount of callings of particular number reduce by second percentage.In this case, particular number can comprise for example inner emergency service number.
With reference to Figure 10, show the block diagram of wireless communication unit, GSM phone (MS) 1000 for example, it is suitable for supporting the inventive concept of the preferred embodiment of the present invention.As known in the art, and for integrality is repeated here, MS 1000 comprises: for example, standard radio frequency assembly and circuit, as antenna 1002, it preferably is coupled to duplexer 1004.Duplexer 1004 provides the isolation between MS 1000 inner receivers and the transmitter chain.Receiver chain generally includes receiver front end circuit 1006 (reception, filtering and centre or base-band frequency conversion are provided effectively).Front-end circuit 1006 is connected in series to signal processing function element 1008.According to a preferred embodiment of the invention, MS 1000 receives, explains and changes its operation in response to the calling interval broadcast of coming automatic network.
Except handling and realize the calling interval broadcast, as above described with reference to the flow chart 900 of figure 9, signal processing function element 1008 is that MS 1000 carries out all signal processing functions, comprising: for example rectification, separate mapping, a release of an interleave channel estimating and decoding, as known in the art.
For integrality, receiver chain also comprises received signal intensity indication (RSSI) circuit 1012, and it is coupled to receiver front end circuit 1006 and signal processing function element 1008 (being realized by digital signal processor (DSP) usually).Controller 1014 also is coupled to receiver front end circuit 1006 and signal processing function element 1008, therefore can receive the error rate (BER) or frame error rate (FER) data from the information of recovering.Controller 1014 is coupled to storage device 1016, and it is used for storage operation mechanism (operating regime), for example decoding/encoding function etc.According to a preferred embodiment of the invention, under the situation of using the calling interval processing, the tabulation of the calling interval of the one or more telephone numbers of memory device stores or destination node or address, and block percentage.
Timer 1018 is coupled to controller 1014, with the timing of operation (transmission of the signal relevant with the time or reception) in the control MS 1000.In the context of the present invention, timer 1018 is adapted such that MS can handle at the calling interval of the time period of predetermined (or indication) self-regulation indication.
About the emission chain, as known in the art, mainly comprise input unit, microphone transducer for example, it is connected in series to transmitter/modulation circuitry 1022 through transmit signal processor 1008.In view of the above, any transmitting all passed through power amplifier 1024, to radiate from antenna 1002.Transmitter/modulation circuitry 1022 and power amplifier 1024 in response to controller, are coupled to duplexer filter or circulator 1004 from the output of power amplifier in operation.Transmitter/modulation circuitry 1022 and receiver front end circuit 1006 comprise frequency up-converted and frequency downconverted function element (not shown).
According to a preferred embodiment of the invention, signal processor 1008 is suitable for tackling any call attempt from the user, and its use is stored in one or more telephone numbers or destination node or the address in the calling interval tabulation.If MS 1000 determines the customer call of interception and attempts comprising one or more telephone numbers or destination node or the address from the tabulation of stored calls gap that then signal processor 1008 decisions are to accept or this call request of refusal.
Certainly, the various assemblies in MS 1000 can be arranged with any appropriate functional topology, and this topology can be used inventive concept of the present invention.And the various assemblies in MS 1000 can be realized with the form of discrete or integrated package, selected final structure based on the MS designer thus.
Different with the method that produces random number, should be understood that a replacement mechanism that realizes calling interval is to calculate the quantity that successful call is attempted, be the quantity (that is, integer OK/Fail ratio being set) of unsuccessful trial then.
Along with the development to the third generation (more than reaching) cellular communication unit, wireless subscriber unit is just becoming than more complicated and more professional in the past.For example, should be understood that inventive concept described herein is suitable for mobile execution environment (MExE) ideally and uses, the function that will carry out this MS calling interval thus is downloaded wirelessly among the MS (perhaps with Java
TMWrite).
In a preferred embodiment of the invention, should be understood that a row destination number, each has the blocking probability relevant with it, can be from Web broadcast.About this, should be understood that each project can be a complete number.As an alternative, what destination node/number can be based on asterisk wildcard, its indication uncared-for one or more numbers when comparing with user's Input Address.
Although reference voice communication air interfaces (for example GSM) has been described the present invention, within the present invention's expection is that inventive concept described herein can be used for any communication system with being equal to.It will also be appreciated that when being applied to GPRS (or other packet communication system, for example Universal Mobile Telecommunications System (UMTS)), the use that substitutes addressing mechanism can benefit from inventive concept described herein.For example, in the data network situation, can use IP address or name server (DNS) address.
Although described the preferred embodiments of the present invention with reference to the enforcement in wireless communication unit, wherein said wireless communication unit can use in GSM, GPRS, UMTS, IS-95 or CDMA2000 wireless communication system, will be appreciated that, the present invention's design can be used in fixed communication unit, for example uses the personal computer based on voice-over ip.Within the present invention expection, be that calling interval is handled other processes of control that can be used in also.For example, this inventive concept can be used for any by such as the gap PDP Context starts the connection of request (to alleviate the signaling load), additional, mobile management process etc.
Should be appreciated that aforesaid wireless communication system, wireless communication unit and the method plan that is used for congestion relief provides at least a or multiple of following advantage:
(i) can will use the congestion relief of calling interval technology to expand to the air interface business that minimizes in the wireless communications environment, finally can cause not connecting the calling of calling to stop beginning.
(ii) the congestion relief mechanism of Ti Chuing has reduced the unwanted business between BSS and this locality (starting) switch, thereby makes resource can be used for having the communication of chance of success.
(iii) this inventive concept can be used in any situation based on the address.
(iv) the specific call gap is target with the travelling carriage, with control such as " denial of service " attack.
Although described specific, preferred embodiment of the present invention above, obviously, those skilled in the art can easily use the variants and modifications of this inventive concept.
Therefore, provide to be used to alleviate congested wireless communication system, wireless communication unit and method, wherein, eliminated the shortcoming relevant recited above substantially with the prior art scheme.
Claims (18)
1. a wireless communication system (500), it provides the mass communication resource for a plurality of travelling carriages (512-516), wherein, described wireless communication system adopts calling interval to handle, and comprise a plurality of communication paths, be used for the communication by an initiation of described a plurality of travelling carriages (512-516) is routed to destination node; Described wireless communication system is characterised in that: one or more in described a plurality of travelling carriages (512-516) are configured to carry out described calling interval and handle.
2. according to the wireless communication system (500) of claim 1, wherein, described calling interval processing by the one or more employings in described a plurality of travelling carriages (512-516) was carried out before proper communication, may unsuccessful calling be initiated and send from described travelling carriage (512) to stop.
3. according to the wireless communication system of claim 2, wherein, insert described wireless communication system (500) afterwards, provide communication system busy indication to the user in the calling that stops request.
4. according to the wireless communication system (500) of any claim in front, wherein, the feature of described communication system (500) also is: determine when one or more addresses or destination node overload and determine and indicate a plurality of travelling carriages to begin the communication equipment that the self-regulation calling interval of described one or more addresses or destination node is handled in response to this.
5. according to the wireless communication system (500) of any claim in front, wherein, for example use Short Message Service, the described one or more transmissions in described a plurality of travelling carriages (512-516) comprise the wireless information of one or more calling interval instructions.
6. according to the wireless communication system (500) of claim 5, wherein, described one or more calling intervals instructions comprise one or more in the middle of following:
(i) one or more addresses of destination node;
(ii) one or more telephone numbers;
(iii) one or more call blocking rates; And/or
(iv) timeout value.
7. according to the wireless communication system (500) of any claim in front, wherein, described wireless communication system (500) is GSM or GPRS or UMTS system.
8. a communication unit (512,536,546) is suitable for promoting the wireless communication unit calling interval in any one wireless communication system of claim 1 to 7 to operate.
9. communication unit according to Claim 8 (536), wherein, described communication unit is the one or more base station switching points that the calling interval instruction is provided that are suitable in described a plurality of travelling carriages (512-516).
10. communication unit according to Claim 8 (546), wherein, described communication unit is to be suitable for producing the operation and the administrative center (546) that will be routed to the one or more calling interval instruction in described a plurality of travelling carriage (512-516).
11. communication unit according to Claim 8 (512), wherein, described communication unit is the travelling carriage (512) that is suitable for carrying out the operation of self-regulation calling interval.
12. any one communication unit (512,522,546) in 11 according to Claim 8, wherein, described communication unit (512,522,546) is configured in GSM or GPRS or UMTS or IS-95 or CDMA2000 or uses on the personal computer of voice-over ip and operate.
13. the congestion relief method in the wireless communication system (700,800,900), the method comprising the steps of:
Call the calling interval operator scheme; The method is characterized in that step:
Carrying out (900) described calling interval in the wireless communication unit in operating in described wireless communication system handles.
14. according to the congestion relief method in the wireless communication system of claim 13, the feature of this method also is step:
At the paging call wireless communication system (500) that stops request afterwards, indicate communication system busy to the user.
15. according to the congestion relief method in the wireless communication system of claim 14, the feature of this method also is step:
Determine when one or more addresses or destination node overload; And
Determine in response to this, indicate a plurality of travelling carriages to begin the self-regulation calling interval of described one or more addresses or destination node is handled.
16. according to the congestion relief method in the wireless communication system any in the claim 13 to 15, the feature of this method also is step: the described one or more transmission wireless informations in described a plurality of travelling carriages, wherein, described message comprises one or more calling interval instructions.
17. according to the congestion relief method in the wireless communication system any in the claim 13 to 16, wherein, described one or more calling intervals instruction comprises one or more in the middle of following:
(i) one or more addresses of destination node;
(ii) one or more telephone numbers;
(iii) one or more call blocking rates; And/or
(iv) timeout value.
18. being used for the processor controls enforcement of rights, the storage medium of a storage of processor executable instruction, described instruction require 13 to 17 any one method steps.
Applications Claiming Priority (2)
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| GB0307151A GB2399988B (en) | 2003-03-28 | 2003-03-28 | Communication unit, communication system and method for reducing network congestion therein |
| GB0307151.1 | 2003-03-28 |
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| CN101223803A true CN101223803A (en) | 2008-07-16 |
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| CNA2004800085964A Pending CN101223803A (en) | 2003-03-28 | 2004-02-24 | Call gapping to reduce network congestion in wireless communication system |
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| JP (1) | JP2006524942A (en) |
| CN (1) | CN101223803A (en) |
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| US8948817B2 (en) * | 2006-10-05 | 2015-02-03 | Nvidia Corporation | Cellular communication system, communication unit and method for broadcast communication |
| JP4272225B2 (en) * | 2006-10-10 | 2009-06-03 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile communication system, mobile communication method, mobile station, and exchange |
| JP4636562B2 (en) * | 2006-10-16 | 2011-02-23 | 富士通株式会社 | Call control system, communication terminal, scale value data storage device, and program |
| KR101366332B1 (en) * | 2007-04-19 | 2014-02-21 | 엘지전자 주식회사 | A method of automatic repeat request(ARQ) in communication system |
| JP5314265B2 (en) * | 2007-10-24 | 2013-10-16 | 株式会社エヌ・ティ・ティ・ドコモ | Transmission processing regulation method, mobile communication system, and mobile station |
| EP2101508A1 (en) | 2008-03-11 | 2009-09-16 | Nokia Siemens Networks Oy | Methods of advanced call gapping and systems thereof |
| CN101711041B (en) * | 2009-12-09 | 2012-10-17 | 华为技术有限公司 | Congestion control method, operation and maintenance center equipment and base station |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8806625D0 (en) * | 1988-03-21 | 1988-04-20 | British Telecomm | Call traffic control |
| US5500889A (en) * | 1994-06-09 | 1996-03-19 | At&T Corp. | Method and apparatus for prioritizing a telephone call according to a level of service of an originator |
| US5548533A (en) * | 1994-10-07 | 1996-08-20 | Northern Telecom Limited | Overload control for a central processor in the switching network of a mobile communications system |
| US5778057A (en) * | 1996-02-09 | 1998-07-07 | Bell Communications Research, Inc. | Service control point congestion control method |
| US5933481A (en) * | 1996-02-29 | 1999-08-03 | Bell Canada | Method of controlling call traffic in a telecommunication system |
| US6259776B1 (en) * | 1997-03-25 | 2001-07-10 | British Telecommunications Public Limited Company | System for controlling telecommunication overload traffic |
| EP0974652A4 (en) * | 1997-04-08 | 2000-08-30 | Banyu Pharma Co Ltd | GENE ASSOCIATED WITH CANCER METASTASE |
| US5982757A (en) * | 1997-07-14 | 1999-11-09 | Motorola, Inc. | Method and apparatus for registering a remote unit in a communication system |
| US6987736B1 (en) * | 2000-09-18 | 2006-01-17 | Bellsouth Intellectual Property Corp. | Router polling system and method |
| US8145228B2 (en) * | 2001-05-10 | 2012-03-27 | Qualcomm Incorporated | Method and apparatus for controlling call request in a communication system |
| US7107061B1 (en) * | 2002-06-28 | 2006-09-12 | Nortel Networks Limited | Adaptive cell gapping overload control system and method for a telecommunications system |
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| JP2006524942A (en) | 2006-11-02 |
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